Black algae or metal stain

[Crazziee]

Hm-mm. Just processed your registration. Look up your address on Google Maps, satellite view.

If Google has your house ID'd correctly, dose your pool with 2 gallons of bleach each PM (or 1/2 gallon, if you've used copper). You appear to have a 16-20x40 modified rectangle with a deep end -- those usually run ~30,000 gallons

Thanks for checking it out. I have been wondering if the pool store misquoted me when they said it was about 44,000 gallons